I did a little reading, and im thinking that my alloy is not sufficient for the pressures im loading to. I settled on a starting load of unique as a test round, the books says its a smidge over 25k psi Or cup... cant remember. So... wheel weight alloy with or without tin added aint quite enough for this according to lasc webpage.
So I will try some 44 special loads with my made bullets, with no other change, and if that is acceptable, I will try water dropped ww for the magnum loads.
I am both enjoying and frustrated by the "problems" im experiencing. If I can get it figured out though, i'll have learned a heck of a lot about the gun and casting and bullet development. I appreciate everyones patience with me as I continue my reckon'n.